This is a followup to the fix of

Bug#51920 Innodb connections in row lock wait ignore KILL until lock wait
timeout

in that fix (rb://279) the behavior was changed to honor when a trx is
interrupted during lock wait, but the returned error code was still
"lock wait timeout" when it should be "interrupted".

This change fixes the non-deterministically failing test binlog.binlog_killed,
that failed like this:

binlog.binlog_killed 'stmt'              [ fail ]
        Test ended at 2010-05-12 11:39:08

CURRENT_TEST: binlog.binlog_killed
mysqltest: At line 208: query 'reap' failed with wrong errno 1205: 'Lock wait timeout exceeded; try restarting transaction', instead of 0...

Approved by:	Sunny Bains (rb://344)